<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script type="application/javascript">
		  function abc(){
			  var num1=1;
			  var num2=2;
			  var num3=3;
			  var result=num1+num2+num3;
			  alert(result);
		  }
		</script>
	</head>
	<body>
		list 页面  显示所有用户
		<button onclick="abc()">点击</button>
	</body>
</html>
